Spiraea plant named ‘Green Carpet’

ABSTRACT

A new and distinct cultivar of Spiraea plant named ‘Green Carpet’, characterized by its compact, and low mounding plant habit; dense and bushy growth habit; and small green-colored leaves.

BOTANICAL CLASSIFICATION/CULTIVAR DESIGNATION

Spiraea×bumalda cultivar name Green Carpet.

BACKGROUND OF THE INVENTION

The present Invention relates to a new and distinct cultivar of Spiraea plant, botanically known as Spiraea×bumalda, and hereinafter referred to by the cultivar name Green Carpet.

The new Spiraea is a product of a planned breeding program conducted by the Inventor in Boisbriand, Quebec, Canada. The objective of the breeding program is to create compact Spiraeas with unique leaf coloration and few to no flowers.

The new Spiraea originated from a cross made by the Inventor of a proprietary Spiraea selection identified as code number G-DW-80-48, not patented, as the female, or seed parent, with a proprietary Spiraea selection identified as code number G-DW-80-106, not patented, as the male, or pollen parent. The new Spiraea was first observed in 1983 and was selected in 1984 as a single plant from the resulting progeny by the Inventor in a controlled environment in Boisbriand, Quebec, Canada, on the basis of its green-colored foliage.

Asexual reproduction of the new cultivar by terminal cuttings taken in a controlled environment in Boisbriand, Quebec, Canada since 1984, has shown that the unique features of this new Spiraea are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

Plants of the cultivar Green Carpet have not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment and culture such as temperature, light intensity and daylength without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Green Carpet’. These characteristics in combination distinguish ‘Green Carpet’, as a new and distinct cultivar:

1. Compact, and low mounding plant habit.

2. Dense and bushy growth habit.

3. Small green-colored leaves.

Plants of the new Spiraea differ from plants of the parents and the cultivars Golden Carpet, U.S. Plant patent application Ser. No. 10/036,935 filed concurrently, and Sparkling Carpet, U.S. Plant patent application Ser. No. 10/036,937 filed concurrently, primarily in foliage color.

Plants of the new Spiraea are similar in foliage color to plants of the Spiraea ‘Little Princess’, not patented. In side-by-side comparisons conducted in Boisbriand, Quebec, Canada, plants of the new Spiraea differed from plants of the cultivar Little Princess in the following characteristics:

1. Plants of the new Spiraea were more compact than plants of the cultivar Little Princess.

2. Plants of the new Spiraea produced no or only a few flowers whereas plants of the cultivar Little Princess produced numerous flowers.

Plants of the new Spiraea can also be compared to plants of the Spiraea ‘Walbuma’, disclosed in U.S. Plant Pat. No. 9,363. In side-by-side comparisons conducted in Boisbriand, Quebec, Canada, plants of the new Spiraea differed from plants of the cultivar Walbuma in the following characteristics:

1. Plants of the new Spiraea were more compact than plants of the cultivar Walbuma.

2. Plants of the new Spiraea and the cultivar Walbuma differed in foliage coloration.

3. Plants of the new Spiraea produced no or few flowers whereas plants of the cultivar Walbuma produced numerous flowers.

BRIEF DESCRIPTION OF THE PHOTOGRAPH

The accompanying colored photograph illustrates the overall appearance of the new cultivar, showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photograph may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Spiraea. The photograph comprises a side perspective view of a typical three-year old plant of ‘Green Carpet’ grown in an outdoor nursery in Boisbriand, Quebec, Canada.

DETAILED BOTANICAL DESCRIPTION

In the following description, color references are made to The Royal Horticultural Society Colour Chart except where general terms of ordinary dictionary significance are used. Plants grown in an outdoor nursery under full sunlight conditions and commercial production conditions in Boisbriand, Quebec, Canada for about three years were used for the following description.

Botanical classification: Spiraea×bumalda cultivar Green Carpet.

Parentage:

Female parent.—Proprietary Spiraea×bumalda selection identified as G-DW-80-48, not patented.

Male parent.—Proprietary Spiraea×bumalda selection identified as G-DW-80-106, not patented.

Propagation:

Type cutting.—Terminal cuttings.

Time to initiate roots.—About 21 to 28 days at 20° C.

Time to produce a rooted cutting.—About 5 to 8 weeks at 24 to 28° C.

Root description.—Fine, fibrous.

Rooting habit.—Freely branching.

Plant description:

Form.—Compact perennial deciduous shrub; dense and low mounded plant habit. Freely branching; lateral branches potentially forming at every node.

Plant height.—About 16.9 cm.

Plant diameter.—About 34.2 cm.

Vigor.—Vigorous.

Lateral branch description.—Length: About 4 cm. Diameter: About 0.8 mm. Internode length: About 5.2 mm. Strength: Weak to moderately strong. Texture: Glabrous. Color: 165A to 166A.

Foliage description.—Leaves simple, alternate, generally symmetrical. Length: About 2.1 cm. Width: About 1.1 cm. Shape: Lanceolate. Apex: Acute. Base: Acute. Margin: Serrate. Texture, upper and lower surfaces: Smooth, glabrous. Venation pattern: Pinnate. Color: Developing foliage, upper surface: 144B to 144C; 144A along veins. Developing foliage, lower surface: 144B; along veins, 144A. Fully expanded foliage, upper surface: 147A. Fully expanded foliage, lower surface: 191A. Venation, upper surface: 146C. Venation, lower surface: 146B. Petiole length: About 1.9 cm. Petiole diameter: About 0.6 mm. Petiole texture: Smooth. Petiole color: 144B.

Flower description:

Flower type and habit.—Few to no flowers. Small single flowers arranged in corymbs; flowers face mostly upright. Flowers self-cleaning.

Natural flowering season.—June to September in Quebec, Canada; flowering sporadic.

Flower longevity on the plant.—About three to four days.

Fragrance.—None detected.

Inflorescence diameter.—About 1.8 cm.

Inflorescence height.—About 1.9 cm.

Flowers.—Quantity per inflorescence: About 7. Appearance: Rotate, five-parted. Diameter: About 5.8 mm. Depth: About 2.2 mm.

Flower buds (showing color).—Length: About 2.1 mm. Diameter: About 1.6 mm. Shape: Oblong, rounded. Color: 63B to 63C.

Petals.—Quantity per flower: Five. Length: About 2.2 mm. Width: About 2.2 mm. Shape: Rounded. Apex: Rounded. Base: Attenuate. Margin: Entire. Texture, upper and lower surfaces: Smooth. Color: When opening, upper and lower surfaces: 61D. Fully opened, upper surface: 63C to 63D; fading to 65D with subsequent development. Fully opened, lower surface: 63D.

Sepals.—Quantity per flower: Five. Calyx length: About 1.6 mm. Calyx diameter: About 1.8 mm. Shape: Deltoid. Apex: Mucronate. Margin: Entire. Texture, upper and lower surfaces: Slightly pubescent. Color, upper and lower surfaces: 153A; towards margin, 59A.

Peduncles.—Length: About 8.3 mm. Diameter: About 0.7 mm. Angle: About 34° from the stem. Strength: Flexible, moderately strong. Color: 146D.

Pedicels.—Length: About 3.7 mm. Diameter: About 0.4 mm. Angle: About 58° from the stem. Strength: Flexible, moderately strong. Color: 146D.

Reproductive organs.—Stamens: Quantity per flower: About 19. Anther shape: Bi-lobed. Anther length: About 0.4 mm. Anther color: 64A. Pollen amount: Moderate. Pollen color: 8D. Pistils: Quantity per flower: About four or five. Pistil length: About 2.1 mm. Stigma shape: Slightly club-shaped. Stigma color: 145C. Style length: About 1 mm. Style color: 11D. Ovary color: 144B.

Seed/fruit.—Seed and fruit production has not been observed.

Disease/pest resistance: Plants of the new Spiraea have not been noted to be resistant to pathogens or pests common to Spiraea.

Weather tolerance: Plants of the new Spiraea have been observed to be tolerant to rain and wind. 

It is claimed:
 1. A new and distinct cultivar of Spiraea plant named ‘Green Carpet’, as illustrated and described. 